Using UHPFRC as a topping layer for orthotropic bridge decks: prototype validation

Author(s): F. Toutlemonde, P. Marchand, F. Gomes, L. Dieng
Paper category: Symposium
Book title: RILEM-fib-AFGC International Symposium on Ultra-High Performance Fibre-Reinforced Concrete
Editor(s): F. Toutlemonde, J. Resplendino
Print ISBN: 978-2-35158-130-8
e-ISBN: 978-2-35158-131-5
Publisher: RILEM Publications S.A.R.L
Pages: 107 – 116
Total Pages: 10
Language: English

Abstract: 
Within the framework of the French national R&D project Orthoplus, an experimental and numerical study has been carried out on UHPFRC used as a topping layer for orthotropic bridge decks. Two large-scale specimens have been tested to assess the role of a thin UHPFRC layer to decrease the fatigue stress at the welded junction between troughs and deck plate under the effect of a local loading by a truck wheel. This solution also allows a dead weight reduction thanks to the very small thickness of UHPFRC compared to the traditional solution with bituminous concrete. Quasi-static loadings under different configurations, as well as fatigue tests under a central loading (up to 2 million cycles aiming to represent 100- years traffic loading) were carried out. Even though the mechanical connection between the steel plate and the UHPFRC layer turned out only partial, the efficiency of UHPFRC in reducing stress concentrations and increasing the structural stiffness of the deck over the lifespan was confirmed.

Online publication: 2014
Publication Type: full_text
Public price (Euros): 0.00